单选题：The air-pollution index went up to 300 within a few days.

题目内容：

The air-pollution index went up to 300 within a few days. A．Right
B．Wrong
C．Not mentioned

参考答案：

答案解析：

Agreat deal has been done to remedy the situation.

Agreat deal has been done to remedy the situation.A．maintain B．improve C．assess

分类：理工类题型：单选题

产褥期生殖系统变化最大的器官是（　）A．子宫 B．乳房 C．阴道及外阴 D．盆底组织 E．输卵管

分类：理工类题型：单选题

临产的诊断指标为（　）A．见红 B．宫颈管消失 C．先露部下降 D．规律宫缩 E．宫口扩张

分类：理工类题型：单选题

Our statistics show that we consume all that we are capable of producing.A．waste

分类：理工类题型：单选题

Up to now, the work has been easy.A．So B．S0 long C．So that D．So far

分类：理工类题型：单选题