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【多选题】
下列关于金属薄板保护层的说法，不正确的有______。A.
对镀锌薄钢板，管径DN≤100mm时，厚度δ=0.35～0.5mm
B.
插接缝可用自攻螺钉或抽芯铆钉连接，而搭接缝只能用抽芯铆钉连接，钉的间距为250mm
C.
金属保护层的接缝形式可根据具体情况选用搭接、插接或咬接形式
D.
搭接或插接的环缝上，水平管道一般使用螺钉或铆钉固定(立式保护层有防坠落要求者除外)
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【多选题】You need to wear a ( ), ( ) and ( ) when you are swimming.
A.
swimming cap
B.
ear plugs
C.
goggles
D.
swimming pool
【单选题】Which of the following exercises is suggested?
A.
Wearing arm weights while you are swimming.
B.
Jogging vigorously in one place for a long time.
C.
Using bicycles that require you to use both your arms and legs.
D.
Walking slowly while swing your arms back and forth.
【单选题】－What club _____Mary want _____ ? －The music club.
A.
is; join
B.
does; to join
C.
can; join
D.
does; join
【单选题】Which of the following exercises is suggested?
A.
Wearing arm weights while you are swimming.
B.
Jogging vigorously in one place for a long time.
C.
Using bicycles that require you to use both your arms and legs.
D.
Walking slowly while swinging your arms back and forth.
【单选题】What club does sherry want to join?
A.
Art and crafts club
B.
Oil painting club
C.
Pottery club
D.
Drama club
【单选题】You are swimming and sunbathing on a beach.
A.
Leave your iPod in a locked waterproof case.
B.
Put your iPod directly in the sunlight while sunbathing.
C.
Listen to your iPod at 50% volume for more than two hours on the beach.
【单选题】Task 2 Choose the right things to do in each of the following situations. 1. You are swimming and sunbathing on a beach.
A.
Leave your iPod in a locked waterproof case.
B.
Put your iPod directly in the sunlight while sunbathing.
C.
Listen to your iPod at 50% volume for more than two hours on the beach.
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