一张工作票中,工作票签发人、工作负责人和工作许可人三者()兼任。工作负责人可以填写工作票。
A.可以;
B.特殊情况可以;
C.不得互相;
D.经领导批准
参考答案:C
The boat is ________ small, we can’t put _______ food in it.
A.much too; so many
B.much too; too much
C.too much; much too
D.too much; so much
短路有什么害处?