某工程合同总额为200万元,工程预付款为24万,主要材料、构件所占比重为60%,则起扣点为 ( )万元。
A.100
B.120
C.140
D.160
参考答案:D
在提取基因组DNA时,RNAase对其污染可影响其提取质量()
The room is _____ 100 people. [ ]
A. too big to hold
B. enough big to hold
C. big enough to hold
D. so big to hold.