判断球的旋转性质主要依据:()
A、击球部位、用力方向及拍的性能;
B、球在空中的飞行轨迹;
C、球落台后的反弹方向。
参考答案:A
When travelling, you are advised to take travellers' checks, which provide a secure ______ to carrying your money in cash.
A.substitute
B.selection
C.preference
D.alternative
小规模纳税人的增值税征收税率为______。
A.0% B.6%或4%C.13% D.3%