在WONDOWS98的桌面上,不能删除的图标是()。
A.我的电脑
B.我的公文包
C.Internet Explorer
D.Microsoft word
参考答案:A
China’s youths topped a list of calculating abilities, but ranked last on ________imagination and 5th from ________ bottom for creativity, according to an educationsurvey of 21 countries and regions.
A.the, the
B.an, the
C./, the
D./ a
阀控密封式铅酸蓄电池充电设备必须具有限流、恒压功能,且恒压波动范围应保持在()。
A、±1%;
B、±2%;
C、±3%;
D、±5%。