参与屈光调节机制的肌肉是()。
A.上直肌
B.内直肌
C.睫状肌
D.下直肌
E.外直肌
参考答案:C
解析:参与屈光调节机制的肌肉是睫状肌。
He collected information on 1,000 people, whose IQ when they were ten years old.[ ]
A.is tested
B.has tested
C.would test
D.had been tested
多数电控自动变速器采用()个电磁阀控制所有的四个前进档的运作。