[单选题] We should all take a leaf ( ) of Lei Feng's book.
A. out
B.to
C. into
D. for

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[单选题]Before take off,you should check that all the luggage compartments are properly open.
A.是
B.否

[单选题]在 WDS 组网中一个 Root AP 可以连接多个 Leaf AP ，但是一个 Leaf AP 只能连接一个 Root AP 。
A.True
B.False

[单选题]We encourage all members to （）__ highest standards.
A.lead to
B.appeal to
C.strive for
D.participate in

[单选题]( )the goal of learning, we all keep silent in the class.
当提到学习目标时，班里的人都沉默啦
A. When it comes to当提到
B. money on
C. share with
D. allow to

[单选题]We all have experienced有经验的 ( ) in our lives.
A.in advance
B. plenty of
C. highs and lows
D. make an effort

[单选题]We’ll send the memo in advance ( ) all people can have enough time to get prepared.
A. in case
B. so that
C. as if
D. ever since

[单选题]We all agree hard working is the ________ of success. 我们都认为努力是成功的秘诀。
A.secret
B. secretary
C. second
D. section

[单选题]As we all know, (_____)honesty is not always useful for social relationships.
A.totally
B. totals
C. total
D. in total

[单选题]We slept with the light________ all night long last night.
A.burnt
B. to burn
C.being burnt
D.burning

[单选题]

We all __________ the authority's decision to move the chemical factory to the suburbs.

applause

applaud

clap

appoint

[填空题]特种设备焊接作业人员考核细则中将钢材分为四类:分别用FeⅠ、FeⅡ、FeⅢ、FeⅣ表示,其中FeⅡ、FeⅣ分别表示（）。

[单选题]Hb的Fe2+变为Fe3+属于
A.氧合作用
B.氧化作用
C.氧的利用系数
D.波尔效应
E.何尔登效应

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