梅雨锋一般没有很明显的（）梯度、而（）梯度比较大，最显著的特征是在切变线附近有一个Qse高值舌。
参考答案：温度；湿度
— I tried many times, but I still failed to complete the experiment.
— Cheer up. _______ and the problem will be solved. [ ]
A. If have a little effort
B. Having a little effort
C. If you have a bit effort
D. A bit more effort
在安装扭曲环时，还应注意将其内圈切槽向（），外圈切槽向（），不能装反。
