During the installation of the groove,the total cross-sectional area of the conductor including insulation in the same groove shall not exceed the inner cross-sectional area of the groove.（ ）。 在线槽安装过程中，同一线槽内包括绝缘在内的导线截面积总和应该不超过线槽内部截面积的（ ）。

单选题

DURING OPERATION OF THE CARGO DOORS:

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单选题

The Presidents during the American Civil War was _____.

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问答题

During the ﹍, the surgeon will ﹍ on the patient‘s heart.（operate）

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单选题

I‘ve a lot of to do during the holiday.

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单选题

In this experiment, the students’ studies are stopped several times during the listening test and asked to report what they _____ during the pause before answering the questions.

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