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问题 单项选择题

下述除哪一项外均是五味子的横切面显微特征( )

A．外果皮散有近圆形的橙黄色石细胞

B．中果皮内散有外韧维管束十余个

C．种皮最外层为径向延长的石细胞，排列呈栅栏状

D．种皮内层石细胞呈多角形、类圆形

E．胚乳细胞呈多角形，内含脂肪油和糊粉粒

答案

参考答案：A

填空题

根据句意和汉语提示，填写恰当的短语完成下列句子。

1. ___________(根据) the weather forecast, there will be rain in most parts of China.

2. Yesterday I took Jenny’s dictionary home ____________(错误地).

3. Boys and girls, be careful enough not to____________(落入) the lake.

4. In our free time, I taught her Chinese and she taught me English. ___________(用这种方式), both of us learned a lot.

5. — Why did you come home so late this afternoon?  

    —I met one of my old friends in the street _____________(意外地) and we had a long talk.
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单项选择题

关于人体组织和体液的回声强度说法，不正确的是

A．一般分为高、中、低、无四级
B．介于两级之间的回声可用“中高回声”和“中低回声”表示
C．可在高回声和低回声之前加用形容词
D．强回声后一定有声影
E．典型的中等回声水平见于肝脾实质
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