现在流式细胞仪设置的分选收获率均在()
A．100%
B．99%以上
C．98%以上
D．95%以上
E．90%以上
参考答案：D
A: I have a problem. I don’t know what to do .
B: Let’s ask Dick for help .He can ______ a good idea to solve your problem .
A． think up
B． give up
C． hang out
D． laugh at
下列各句均有一处错误，找出并改正。
1. Let's to fly a kite in the park.
__________________
2. John don't like walking to school.
3. He wants go to a movie today.
4. The children are on their way school.
5. They always go pass a big shop.
