填空题

A—assembly line
B—packer
C—forklift
D—explosive materials
E—fire extinguisher
F—loading dock
G—machine operator
H—electrical hazard
I—conveyor belt
J—safety boots
K—shipping clerk
L—time card
M—warehouse
N—hard hat
0—earplug
P—hand truck
Q—safety earmuffs
装配线灭火器

【参考答案】

A E

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单项选择题

The purpose of installing a camera inside the new buses is to（）

A. keep a close watch over the road ahead
B. take pictures of the passengers on board
C. increase the efficiency of the transit system
D. help the Transit Police detect criminals