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【单选题】
下列关于固定式硫化氢检测仪的标定操作，说法错误的是（）。A.
标气瓶的压力不得低于1Mpa
B.
操作前需将ESD-2关于硫化氢浓度报警
C.
标定时需将防雨罩拆卸，标定完成后必须装回
D.
若未将标定探头超驰，仅现场状态灯显示黄色，报警喇叭不会响起
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【单选题】The twins usually leave _____ home _____ school very early. [ ]
A.
to, for
B.
for, to
C.
from, to
D.
/, for
【单选题】The twins usually stand ____their parents ,and their parents are in the middle .
A.
beside
B.
to
C.
on
D.
next
【单选题】The twins usually_____milkandbreadforbreakfast,but Jim_____somecoffeeforit.
A.
have/have
B.
have/has
C.
has/have
D.
/
【单选题】The writer wants to impress you that______.
A.
American people are more busy than people in the other countries
B.
American people are more friendly than they appear
C.
American people are mostly moving at fast pace but they are also ready to help those in need
D.
American people like to help foreigners
【多选题】what are the two suggested models for giving a comment as an attention getter for LO?
A.
statistic model
B.
problem claiming model
C.
quotation model
D.
assumption model
【单选题】People have realized that resources are wasted if goods_________.
A.
are not of lasting value
B.
are not sold at a high price
C.
remain unsold for a long time
D.
remained unsold in export markets
【简答题】The twins usually stand ____their parents ,and their parents are in the middle
【单选题】We have P.E lessons _____. [ ]
A.
every two days
B.
each two days
C.
every two day
D.
each two day
【单选题】The twins usually milk and bread for breakfast, but Jim only some coffee for it.
A.
have; have
B.
have; has
C.
has; have
D.
has; has
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