皮皮学，免费搜题
登录
搜题
【单选题】
气相色谱仪气路系统工作时要求（ ）A.
先稳定载气的流量，再稳定其压强
B.
先稳定载气的压强，再稳定其流量
C.
压强和流量同时稳定
D.
只需要稳定流量
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Your prompt reply ____.
A.
will be highly appreciated
B.
will be thanked
C.
is to be thanked
D.
is appreciated high
【单选题】But if you place your order not later than the end of this month, we would ______ prompt shipment．
A.
sure
B.
assure
C.
insure
D.
ensure
【单选题】As your prompt attention to shipment is most desirable to all parties ______ , we hope you will let us have your telegraphic shipping advice without further delay.
A.
concern
B.
concerning
C.
to concern
D.
concerned
【单选题】Your prompt rely().
A.
will be highly appreciated
B.
will be thanked
C.
is to be thanked
D.
is appreciated high
【单选题】Toxic and infectious substances should be classified into ______ of dangerous goods.
A.
Class 2
B.
Class 4
C.
Class 6
D.
Class 8
相关题目：