He refused to tell us whether he ________ (undertake) the job.

将盛有适量水的容器放在水平地面上，用弹簧测力计将系有细线的铁块浸没在水中处于静止状态，此时弹簧测力计的示数为F，如图所示.

(1)若细线突然断了，铁块沉到容器底部静止，此时地面受到的压力和原来相比▲(选填“不变”、“变小”或“变大”).

(2)已知月球对物体的引力是地球对同一个物体引力的1/6，若在月球上做此实验，将容器放在月面上，实验情况仍如图所示，当铁块处于静止时，弹簧测力计的示数▲(选填“等于零”、“等于F/3”或“等于F/6”).

__________，塞上燕脂凝夜紫。(李贺《雁门太守行》)

My mother's work is _____ (make) our city safe.

本诗首联表现了诗人什么样的性格？请加以分析

()1. Don't be late again.A. A new watch.

()2. May I have a cup of tea?B. Me ，too.

()3. I like the red fan.C. I see.

()4. What's that on the desk?D. Sure.

()5. Where's Dad?E. Perhaps he's in the study.

()6. Shall we go to the zoo by bike?F. It's Bob's ，I think. .

()7. Whose kite is this?G. Good idea.

()8. Can I have a look at your dress?H. Yes. Here you are.

is ，the ，what ，weather ，today ，like

____________________________________________

The boys are sitting under the tree.(对划线部分提问 )

___________________________________________

如图直线 AB，CD 被直线 EF 所截， AB∥CD，∠ 1=120 °，则∠ 2=______

Those who’d like to visit the exhibition ________ (sign) your names here.