skipping rope

skipping rope指的是下列哪项运动？

What would the author do for skipping a day of work?

The following is a list of both healthy and unhealthy eating habits. Tick the unhealthy ones based on your understanding of the text.Skipping meals

Effective readers do all the following EXCEPT . A: concentrating on the important bits, skimming the rest, and skipping the insignificant parts B: using different speeds and strategies for different reading tasks C: translating mentally every sentence they read D: using background information to help understand the text

函数$f(x)=x+\sin x$的( )。 A: 上凸区间为$(2n\text{ }\!\!\pi\!\!\text{ },(2n+1)\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$((2n-1)\text{ }\!\!\pi\!\!\text{ },2n\text{ }\!\!\pi\!\!\text{ })$ B: 上凸区间为$((2n-1)\text{ }\!\!\pi\!\!\text{ },2n\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$(2n\text{ }\!\!\pi\!\!\text{ },(2n+1)\text{ }\!\!\pi\!\!\text{ })$ C: 上凸区间为$(n\text{ }\!\!\pi\!\!\text{ },(n+1)\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$((n-1)\text{ }\!\!\pi\!\!\text{ },n\text{ }\!\!\pi\!\!\text{ })$ D: 上凸区间为$((n-1)\text{ }\!\!\pi\!\!\text{ },n\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$(n\text{ }\!\!\pi\!\!\text{ },(n+1)\text{ }\!\!\pi\!\!\text{ })$

There are _____ texts. They are Text A _________________, Text B _________________, Text C _________________, Text D _________________.

【单选题】skipping rope 指的是下列哪项运动? A. 拔河 B. 慢跑 C. 跳绳 D. 吊环

There five texts in Chapter 6. Text A _________________________; Text B _______________________; Text C _______________________; Text C _______________________; Text E _______________________;

对数螺线$r={{\text{e}}^{\theta }}$在$\theta =\frac{\text{ }\!\!\pi\!\!\text{ }}{2}$对应点处的切线的直角坐标方程为( )。 A: $y+x={{\text{e}}^{\frac{\text{ }\!\!\pi\!\!\text{ }}{2}}}$ B: $y-x={{\text{e}}^{\frac{\text{ }\!\!\pi\!\!\text{ }}{2}}}$ C: $y={{\text{e}}^{\frac{\text{ }\!\!\pi\!\!\text{ }}{2}}}(x+1)$ D: $y={{\text{e}}^{\frac{\text{ }\!\!\pi\!\!\text{ }}{2}}}(x-1)$