有机磷杀虫药重度中毒者,测定的全血胆碱酯酶活力在()
A.50~70%
B.30~50%
C.30~40%
D.30%以下
E.0
参考答案:D
What time does Jane _____after school?
A.do her homework
B.does her homework
C.do her homeworks
D.does her homeworks
砌体结构承重墙的布置应尽量满足以下条件,其中()是不正确的。
A.尽可能采用横墙承重方案
B.承重墙的布置力求简单、规整,纵墙宜拉通
C.墙上门窗洞口应上下对齐
D.尽可能采用纵墙承重方案