第3题: [单项选择]下列分解因式正确的是( )． A. x3-x=x(x2-1) B. m2+m-6=(m-3)(m+2) C. 1-a2+2ab-b2＝(1-a+b)(1+a-b) D. x2+y2=(x+y)(x-y) E. (E)A、B、C、D都不正确 参考答案:C 答案解析:[解析] (A)中x2-1还可分解成(x+1)(x-1)；(B)中m2+m-6应分成(m+3)(m- 2)，所以(A)、(B)都不正确；x2 第4题:[单选题]在使用传感器进行特高频局部放电检测时，应戴绝缘手套，避免手部（ ）传感器金属部件。 A.间接接触 B.靠近 C.直接接触 D.远离 参考答案:C
第5题: [单项选择]下列哪个药物是磷酸二酯酶抑制药( )。 A. 硝酸甘油 B. 利舍平 C. 氯贝丁酯 D. 卡托普利 E. 氨力农 参考答案:E 答案解析:[知识点] 强心药
第14题: [单项选择] {$mediaurl}Why does the student go to see his adviser A. To find out if he can change one of his classes B. To ask her for a letter of recommendation C. To check the time of his registration appointment D. To learn if he still has required courses to take 参考答案:D 答案解析:[解析] 1-5 M: Hi! Are you busy right now W: Oh, hi, Sean. There’s a meeting at two-thirty, but
