暖通工程制图中，送风管的风道代号为( )。A．SB．PC．KD．H

动词填空

小题1:The teacher seems ________ (know) everything about it. We’d better tell her ourselves.

小题2:The keyboard is used in many ways, including _______ (type).

小题3:If he _______ (not be) busy tomorrow, he’ll phone you.

小题4:Floods _______ (wash) away thousands of houses in China every year.

小题5:There _______ (be) a football match in our school this weekend, isn’t there?

小题6:Can’t you see the boy _________ (lie) on the grass? Yes.

小题7:______ Sandy ______ (practice) the piano from 7:00 to 8:00 last night?

小题8:While we were having lunch, it _______ (start) to rain.

小题9:We’d better _______ (not climb) the tall tree. It’s too dangerous.

小题10:I won’t see the film tonight because I ________ (see) it twice.

目前常用MET表示运动强度的原因是（）

A.MET与能量消耗直接相关

B.运动时测定靶心率有一定困难

C.热卡与MET无明确的线性关系

D.热卡与MET有明确的曲线关系

E.使用心率表示运动强度已过时

对易霉腐的商品在储存时必须严格控制温、湿度，并做好商品防霉和除霉工作。

西域都护

最容易成为价格操纵者的厂商是经营( )业务的厂商。

A．竞争性
B．垄断性
C．垄断竞争性
D．寡头垄断性