患者意识清，双侧面瘫，四肢瘫，不能言语、进食，但眼球可上下运动示意，与其相符的有以下

一列简谐波在x轴上传播，如图12-3-13，t₁时刻的波形如图中实线所示，t₂时刻的波形如图中虚线所示.已知Δt=t₂-t₁="0.1" s，问：

图12-3-13

（1）若波沿x轴正方向传播，且Δt<T，这列波的传播速度是多大？

（2）若波沿x轴正方向传播，但Δt无约束条件，波速是多大？

（3）若传播方向及周期均无约束条件，波速是多大？

（4）若波速v="340" m/s，则波向哪个方向传播？

根据首字母及句意补全单词。

1. She is very t        ;she needs something to drink.

2. If you have too much yin, you'll feel w       and tired.

3. All of us should try our best to i        our environment.

4. Eating a b       diet helps us to keep healthy.

5. He goes to school e____ every morning, so he never gets late.

By nine o'clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ____ appeared

a rare rainbow soon.

[ ]

A. of which

B. on which

C. from which

D. above which

机体缺乏下列哪种维生素易导致坏血病（）

A.维生素A

B.维生素B

C.维生素C

D.泛酸

E.叶酸

宾客入住时发现房价与预订时的价格不符时，如何处理？