477.THE RED LIGHTS ( ) IN HALFSECOND INTERVALS.

A. 　GOES

B. 　LEAVES

C. 　GETS

A. 　GET INTO

B. 　GO INTO

C. 　ENTER

A. 　确保间隙在限制范围内。

B. 　确保空间有限。

C. 　确保空间是受限的。

A. 　 does not permitted to

B. 　 not permitted to do

C. 　 permit to do

A. 　The data of the initial version shall be indicated on each page until
recision,and the data of the brand new version shall be indicated after
revision.

B. 　The data of the initial version shall be indicated on each page until
modified,and the data of the latest version shall be indicated after
modified.

C. 　Each page shall bear the date of the original issue until revised and,
when revised, that of the latest revision.

A. 　Copy density should be the same throughout the page.

B. 　Copy density must be different throughout the page.

C. 　Density of copy must be consistent throughout the page.

A. 　When there is trichloroethylene,you should not worry about it.

B. 　Trichloroethylene is good for health.

C. 　Trichloroethylene is hazard for health.

A. 　the lower seal comes into view when you pull the lower bearing down.

B. 　The lower seal shows as the lower bearing is pulled down.

C. 　The lower seal appears as the up bearing is pulled down.

A. 　如果在测试过程中,流量指示器没有达到预定位置,则使用此备用程序。

B. 　如果在测试结束后,流量指示器没有达到设定位置,则使用此附加程序。

C. 　如果在测试结束后,流量指示器没有达到设定位置,则使用此备用程序。

A. 　If you cannot remove a nut because of corrosion, apply penetrating oil.

B. 　If you cannot disassembly a bolt because of corrosion, use penetrating
oil.

C. 　If you cannot remove a bolt because of corrosion, apply penetrating
oil.