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【判断题】
可编程序控制器梯形图由左右母线、编程触点、线圈和连接线组成。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】His contributions to charity were generous. His ___ was appreciated by those he helped.
【单选题】Varieties have been bred which show both improved timber production and a prolongation of the flowering period to increase nectar yields for bee-keepers.
A.
resistance
B.
development
C.
supplement
D.
production
【简答题】婴幼儿服用四环素易致牙齿黄染,是由于四环素易 ,故 等人禁用。
【单选题】he newly-discovered star was named _____ a Chinese astronomer ________his contributions to astronomy.
A.
for; in favor of
B.
after; in honor of
C.
by; in memory of
D.
as; in praise of
【简答题】The first phase of timber production is _______________.A. Purchasing
& management B. Tree
marking C. Felling D. Delimbing ,
bucking, bunching
【单选题】The newly-discovered star was named _____a Chinese astronomer _____ honor of his contributions to astronomy.
A.
for; in
B.
after; for
C.
as; in
D.
after; in
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