下列现象中,属于扩散现象的是 A.春天,柳絮飞扬 B.夏天,荷花飘香 C.秋天,

题型:选择题

问题:

下列现象中,属于扩散现象的是

A.春天,柳絮飞扬

B.夏天,荷花飘香

C.秋天,树叶飘落

D.冬天,雪花纷飞

考点:分子的热运动
题型:选择题

根据每句话的意思以及首字母填入恰当单词,使得句意连贯。

1. I can't afford this car because it is too e___________.   

2. Listen to me carefully. I'll e_________ the rules of the game.   

3. Can you e_________ yourself in English?   

4. Her father is a worker and he works in a f____________.   

5. Jackie Chen is f____________ as a movie star.   

6. There are many sheep on this f_________.   

7. The mother is f_________ the baby.   

8. Chinese are enjoying the Spring F____________.   

9. May is the f________ month of the year.   

10. Students often f___________ doing homework at night.

题型:选择题

从明朝开始,我国封建帝王诏书开头的套语是哪四个字?

题型:选择题

以下所给出的现象中,物体运动状态不发生改变的是(  )

A.熟透的苹果从树上下落

B.小孩乘坐摩天轮匀速转动

C.原来静止的火车开始出站台

D.人站在自动扶梯上匀速斜向上运动

题型:选择题

有关甲状腺滤泡癌的特点描述中,哪项是错误的:

A.瘤细胞浸润被膜和血管
B.易发生早期血行转移
C.肿瘤多呈结节状,境界较清,包膜不完整
D.瘤细胞核呈毛玻璃样
E.滤泡状结构,上皮具有不同程度的异型性

题型:选择题

不属于阀门压盖漏料的原因可能是()。

A、填料失灵

B、预紧力过小

C、紧固件失灵

D、阀杆密封面过紧

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