问题
单项选择题
液氮保存和复苏细胞的基本原则是( )
A．快冻快溶
B．慢冻慢溶
C．慢冻快溶
D．快冻慢溶
E．自然溶冻
答案
参考答案：C
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液氮保存和复苏细胞的基本原则是( )
A．快冻快溶
B．慢冻慢溶
C．慢冻快溶
D．快冻慢溶
E．自然溶冻
参考答案：C
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| What is the best way to study? This is a very important question. Some Chinese students often 1 very hard for long hours. It is a 2 habit, but it is not a better way to study. An efficient (讲效率的) student must 3 enough sleep, enough food and enough rest. Every week you 4 to go out for a walk or visit some friends or some nice places. It's good 5 your study. When you return to your studies, you'll find yourself 6 than before and you'll learn more. Maybe we can 7 that learning English is 8 taking Chinese medicine. We don't mean that it's bitter (苦的). We mean that like Chinese medicine, the efficiency of your study 9 slowly but surely. 10 slowly but surely every day and effects will come just like Chinese medicine. | ||||
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