接通率几时，应调整系统设置（IVR、路由），呼叫溢出等（）。 A.一级预警 B.二级

______ they live in the same house, we would no trouble finding them.

---But as traveling salesmen as well as seasonal herdsmen and farmhands, as you know, they move house _______ many of the Americans who live on wheels.

A．As far as; as often as

B．As well as; as well as

C．As long as;;as often as 　　　

D．As long as ; as far as

下列胆道T型管的护理，哪项不妥()。

A．妥善固定

B．保持通畅

C．每日按时冲洗

D．每日更换引流瓶

E．记录引流量和性质

诱变育种在诱变处理后从哪一代开始选择？（）

A.M3代

B.M2代

C.M1代

D.以上全不对

雌性第1触角通常短小，不能活动的是（）

A.裸腹潘

B.象鼻潘

C.秀体潘

D.蚤状潘

加热器的分类有哪些？