浪淘沙lànɡ táo shā

关于内分泌系统的最佳描述是（）

A.区别于外分泌腺的系统

B.无导管，分泌物直接进入血液的腺体

C.由内分泌腺及全身内分泌细胞组成的信息传递系统

D.分泌物通过体液传递信息的系统

E.都通过下丘脑-腺垂体-内分泌腺（细胞）-激素系统的反馈调节

根据短文内容和所给的首字母，写出短文中所缺的单词，使短文完整、合乎情景。

Hi everyone, I’ve been in Xuzhou for over a week now. I’m having a g  小题1:time. During the first f  小题2: days I visited some tourist attractions — Yunlong Lake, Yunlong Hill, Guishan Han Tomb(汉墓), etc. Most p  小题3: were crowded with tourists, so yesterday I went shopping and I b 小题4: some souvenirs. Today I went to an interesting art gallery. I got lost on my w  小题5: back to the hotel, but it didn’t matter— I found a really good market w 小题6: lots of small shops. I ate in the hotel the first night, but usually I go out and have dinner in a restaurant b 小题7: the food is fantastic. I’ve s 小题8: a lot of money, but it’s certainly worth it. I like people in Xuzhou. They are s 小题9: nice people! I’ve taken many photos so you’ll be able to see f 小题10: yourself when I come back home next Wednesday. See you then!

癥瘕久病体质较弱者，治宜 （）

A.理气行滞

B.健脾补肾

C.宜攻宜破

D.攻补兼施

E.以上均不可

图示结构（杆件截面为矩形）在温度变化时，已知t₁>t₂。若规定内侧受拉的弯矩为正，则各杆端弯矩为：（）

A.A

B.B

C.C

D.D

突变率