落球粘度计适用于测定粘度较低的透明的涂料产品。( )
参考答案:错
The great trouble in ________ for her is that she will have to face the financial problem herself.[ ]
A. hand
B. store
C. danger
D. time
原始地球大气为还原性大气的原因是()。
A.不含氧气
B.不含二氧化碳
C.富含氢
D.富含甲烷