观感质量抽查时的记录方法按下列规定:抽查点(处)为“好”的在质量状况栏中打“()”。
A、△
B、×
C、○
D、√
参考答案:C
计算:
(1)(-2a2b)2•(-2a2b2)3=______
(2)(3×102)3×(-103)4=______
(3)[(-3mn2•m2)3]2=______
.Chinese people were so excited when they saw president Hu ____the PLA on the National Day of 2009.
A.inspect
B.check
C.observe
D.examine