关于树胶肿的叙述，错误的是（） A.是三期梅毒的标志 B.自觉症状明显，疼痛剧烈 C

--How does Jack usually go to school?  

--He_____________ride a bike, but now he_______________there to lose weight.

A．used to, is used to walk

B．was used to, is used to walking

C．was used to, is used to walk

D．used to, is used to walking

完成句子.

1. How's the weather in Dali? (改为同义句)

    ________ ________ ________ ________ in Dali?

2. They are running on the beach. (对划线部分提问)

    ________ ________ they ________ on the beach?

3. 女孩们正在拍照.

    The girls ________ ________ ________.

4. 孩子们在水池里玩得很开心.

    The kids are ________ ________ ________ ________ at the pool.

5. 让我看看你学校的照.

    Let me ________ ________ the photo of your school.

混合型睡眠呼吸暂停综合征

合成气的净化的主要内容是什么？

在任何操作条件下，结焦末期炭化室底部压力应（）大气压力。

A、低于

B、高于

C、等于

D、与大气压力无关