According to the passage, which is the principal energy source of home heat
A. Wood.
B. Coal.
C. Natural gas.
D. Petrol.
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总监理工程师由监理单位法定代表人书面授权，而总监理工程师代表则由( )同意。
A. 监理工程师
B. 总监理工程师
C. 监理单位技术负责人
D. 监理单位法定代表人
Which of the following is true about wedding vows
A. Making vows is like signing a contract of love.
B. They are composed by the newly weds.
C. They are announced by the minister.
D. They are exchanged at the wedding reception.
How many types of motors are generally used in the shaver
A. Two.
B. Three.
C. Four.
D. Not known.
可以给演示文稿设置打开权限密码和______权限密码。
A. 复制
B. 移动
C. 修改
D. 删除
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