本课配套习题挑战模式1/5
单选题
难度系数:
1.南海资源丰富,其面积约为350万平方千米,相当于我国的渤海、黄海和东海总面积的3倍,其中350万用科学记数法表示为()
A: 0.35×108 |
B: 3.5×107 |
C: 3.5×106 |
D: 35×105 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rOo5oSP5Y2V5L2N77ya5LiH
- 答案:Qw==
5oqK5LiA5Liq5aSn5LqOMTDnmoTmlbDooajnpLrmiJBhw5c8aW1nIHdpZHRoPTIyIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0FBLzM0L3JCQUNGRlRJcEdXUnlfdGlBQUFCVlVjQVBqMDUzMy5wbmciPueahOW9ouW8j++8iGHlpKfkuo7miJbnrYnkuo4x5LiU5bCP5LqOMTDvvInvvIzlj6vnp5HlraborqHmlbDms5XjgII8YnI+5Y+I4oi1MeS4hz0xMDAwMC7mlYXpgIlD44CC
本课配套习题挑战模式3/5
单选题
难度系数:
3.银河系中恒星约有160000000000个,也就是()
A: 16亿个 |
B: 160亿个 |
C: 1600亿个 |
D: 16000亿个 |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWI5oCd6ICD5LiA5Lq/PTxpbWcgd2lkdGg9MjIgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvMzQvckJBQ0ZGVElwR1dSeV90aUFBQUJWVWNBUGowNTMzLnBuZyI+LG49
- 答案:Qw==
MeS6vz08aW1nIHdpZHRoPTIyIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzNFL0IwL3JCQUNKbFRJcEd6aHJuTkJBQUFCVVlwQWVfWTkyNy5wbmciPiwgMTYwMDAwMDAwMDAwPTE2MDDkur/vvIzmlYXpgIlD44CC
本课配套习题挑战模式5/5
单选题
难度系数:
5.100张纸的厚度大约是1 cm,100万张纸的厚度约为()
A: 10 m |
B: 100 m |
C: 1000 m |
D: 10000 m |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWI5oCd6ICDMTAw5LiH5pivMTAw55qE5aSa5bCR5YCN
- 提示2:5YaN6ICD6JmR5Y6Y57Gz5ZKM57Gz55qE5Y2V5L2N5o2i566X
- 答案:Qg==
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