下面语句正确的是 [ ]
A.b=2a+1
B.INPUT a；b；c
C.PRINT 3*a+b
D.INPUT a+b，c
答案：C
I _______ some clothes to charity because they were too small for me. [ ]
A. handed out
B. gave away
C. ran out of
相位表通常采用（）仪表。
A.磁电系
B.电磁系
C.电动系
D.电子系
