中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.下列算式结果是－3的是（）
A:  |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：PGltZyB3aWR0aD0zNSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83My8xRC9yQkFDRTFUSW1HaUFldld4QUFBQmVSTk56Njg3MzcucG5nIj49PGltZyB3aWR0aD0yMCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BQS8yNi9yQkFDRkZUSW1HdWpkOE9GQUFBQmhEU1ZyY0E1MDkucG5nIj4=
- 答案：RA==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.下列各式中正确的是()
A:  |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：5YiG5byP55qE5pW05pWw5oyH5pWw5bmC6L+Q566XIDxpbWcgd2lkdGg9MTAwIGhlaWdodD02MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNFL0U4L3JCQUNKMVRJbURPeFFNd2JBQUFEWVN3SUdhbzU3OS5wbmciPg==
- 答案：Qw==
6Kej562UOuKItTxpbWcgd2lkdGg9MTA2IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzczLzFEL3JCQUNFMVRJbURPd19tWUFBQUFEZkJFWW8xdzcwMi5wbmciPiBCIDxpbWcgd2lkdGg9MTQxIGhlaWdodD02MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0FBLzI2L3JCQUNGRlRJbURQd3NubTVBQUFEenc3SmJoTTQ3OS5wbmciPkQ8aW1nIHdpZHRoPTE0NSBoZWlnaHQ9NjIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9BOS9yQkFDSmxUSW1EUFNTSEdrQUFBRUFfMDdQaFk4OTIucG5nIj48YnI+5pWF6YCJQw==
本课配套习题挑战模式3/5
单选题
难度系数：
3.用四舍五入法，对0.0070991取近似值，若要求保留三个有效数字，并用科学记数法表示，则该数的近似值为（）
| A: 7.10×10-2 |
| B: 7.1×10-2 |
| C: 7.10×10-3 |
| D: 7.09×10-3 |
一次做对，真牛！
+5奖励规则>
- 提示1：5pyJ5pWI5pWw5a2X77ya5LuO5LiA5Liq5pWw55qE5pyA5bem6L6556ys5LiA5Liq5LiN5piv6Zu255qE5pWw5a2X566X6LW377yM6YO95piv5pyJ5pWI5pWw5a2X
- 提示2：56eR5a2m6K6h5pWw5rOV77yaPGltZyB3aWR0aD02MSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9BOS9yQkFDSmxUSW1EeWlwenUyQUFBQi1VQkVnaFk0NDgucG5nIj4oMTxpbWcgd2lkdGg9MTUxIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzNFL0U4L3JCQUNKMVRJbUR5d25zd1pBQUFFTVU4WEp3STg2NC5wbmciPik=
- 答案：Qw==
6Kej562U77ya4oi16KaB5L+d55WZ5LiJ5L2N5pyJ5pWI5pWw5a2XMC4wMDcwOTkxPGltZyB3aWR0aD02NCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9BOS9yQkFDSmxUSW1Eemh1YUJUQUFBQnhOMEtjZTgxNzkucG5nIj48YnI+4oi0PGltZyB3aWR0aD01MiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83My8xRC9yQkFDRTFUSW1EekNvWFJnQUFBQmk5ckVuWms2ODIucG5nIj49Ny4xMMOXMTA8c3VwPi0zPC9zdXA+PGJyPuaVhemAiUM=
本课配套习题挑战模式4/5
单选题
难度系数：
4.
有意义，则 的取值范围是（ ）
| A:
|
| B:
|
| C:
|
| D:
|
或
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 答案：RA==
PHA+6Kej562U77ya4oi1PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNFL0U4L3JCQUNKMVRJbUdqREJwYmhBQUFEWDUxbjVFODIwNS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRTgvckJBQ0oxVEltR2pEQnBiaEFBQURYNTFuNUU4MjA1LnBuZyIgd2lkdGg9IjEzNiIgaGVpZ2h0PSIyNiI+5pyJ5oSP5LmJ55qE5p2h5Lu25pivPGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNFL0E5L3JCQUNKbFRJbUdqamNBQUxBQUFDb28wQlhrMDcxOS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQTkvckJBQ0psVEltR2pqY0FBTEFBQUNvbzBCWGswNzE5LnBuZyIgd2lkdGg9IjcxIiBoZWlnaHQ9IjQyIj48YnI+5pWFPGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzNFL0E5L3JCQUNKbFRJbUdqVEFhXzJBQUFCa3AxSFliWTQzMS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQTkvckJBQ0psVEltR2pUQWFfMkFBQUJrcDFIWWJZNDMxLnBuZyIgd2lkdGg9IjM4IiBoZWlnaHQ9IjIwIj7kuJQ8aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRTgvckJBQ0oxVEltR2ppR21BQkFBQUJvV0U1aVpBNjU3LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9FOC9yQkFDSjFUSW1HamlHbUFCQUFBQm9XRTVpWkE2NTcucG5nIiB3aWR0aD0iNDAiIGhlaWdodD0iMjAiPjxicj7mlYXpgIlEPC9wPg==
本课配套习题挑战模式5/5
单选题
难度系数：
5.
下列计算正确的是（ ）
| A:
|
| B:
|
| C:
|
| D:
|
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5ZCM57G76aG555qE5a6a5LmJPC9wPg==
- 提示2：PHA+5ZCM5bqV5bmC55u46Zmk77yM5bqV5pWw5LiN5Y+Y77yM5oyH5pWw55u45YePPGJyPjwvcD4=
- 答案：Qw==
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
