【单选题】如开关电源中“电池容量”设置错误会对蓄电池组的性能会造成影响,但不包含()
A.
容量设置过大,电池充电流大,容易过充发热、电池温度高、电池失水,寿命缩短,严重时可能导致电池鼓胀;
B.
容量设置过大,电池放电电流大,电池放电时间不足容量;
C.
设置偏小,电池充电流小,电池放电后容易充电不足,造成电池盐化失效,寿命缩短。
【简答题】试判断图示结构的超静定次数为()。 (A) 0 (B) 4 (C) 3 (D) 1
【单选题】对刀的目的就是要获得工件坐标系原点在机床坐标系中的( )。
【单选题】There were many people present ahid he appeared only for a few seconds, so I only caught a ______of him.
【多选题】[2-18]下列项目所包含的进项税额,不得从销项税额中抵扣的有( )。
【简答题】网页中的超链接按照目标对象的不同可以分为文档链接、 第一空 、 第二空 、 脚本链接、空链接等。
【简答题】过充、过放、过电流会导致电池 ______ 。
【单选题】I only caught a ______ of the letter, so I can't remember where it is from.
【单选题】There were many people present and he appeared only for a few seconds, so I only caught a ________ of him.