腮腺粘液表皮样癌的超声特征是:A.呈实性回声,多数回声增强 B.

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问题单项选择题

腮腺粘液表皮样癌的超声特征是:

A.呈实性回声,多数回声增强

B.边界不清､不完整,内呈低回声区,肿瘤较大时呈囊性改变

C.内部呈不均质,肿瘤高分化时,呈中等回声

D.肿瘤较小时呈囊实性改变

E.以上都不是

答案

参考答案：C

听力题

根据句子意思，用括号中所给单词的适当形式填空。

小题1:For her ▲ (twelve) birthday, Jenny invited her teachers and classmates to her house.

小题2:—How was your visit to Nanjing Confucius Temple at the weekend?

—Wonderful! My parents and I enjoyed ▲ (we) very much there.

小题3:After several ▲ (week) study, the American students found Chinese interesting to learn.

小题4:You can see the ▲ ( happy) on her face because she can’t find her lovely cat.

小题5:When a little bit of rain falls, the plants hold the water. Without plants, the land can become a desert much ▲ (easy).

小题6:—May Day is coming, would you like to go ▲ (climb) with us?

—Why not, I’d love to go to Zijin Mountain.

问答题简答题

搅拌器的两个功能是什么？改善搅拌效果的工程措施有哪些（提高液流的湍动程度）？