在Cotton分类法中，如果声门下区出现完全性阻塞，应诊断为（） A.1度 B.2度

阅读下面短文，用括号内所给动词的适当形式填空(必要时可加情态动词或助动词）。

“Everything happens for the best," my grandmother said whenever things weren’t going my way. "Don’t worry, one day your luck 小题1:_______(change). "

Grandmother was right, as I discovered after graduating from college. I had decided to be sports announcer (广播员) in a radio station, so I 小题2:_______ ( go) to Shanghai and knocked on the door of every station. But I got refused every time.

In one station, a kind lady said my problem was short of experience. " Get some work with a small station and 小题3:_______(work) your way up ," she said.

I couldn’t get a job there, either. Then my dad told me a businessman had opened a company and needed someone 小题4:_______ ( manage) the sports center. But again, I didn’t get the job.

I felt really down. "Your luck will change," Granny reminded me. I tried another radio station in Beijing. But the owner, a nice man, told me he already had someone.

As I left his office, I asked, " How can someone be a sports announcer if he 小题5:_______(not, get) a job in a radio station?"

I 小题6:_______( wait) for the elevator when I heard the man call, " What was that you said about sports? Do you know anything about football?" I 小题7:_______(put) in front of a microphone and asked to imagine I was commenting (评论) on a football game. "Now you 小题8:_______ (watch) the football game between Lu Neng and Shen Hua. . . "

On my way home, Granny’s words came back to me, " One day your luck will change, boy. And when it 小题9: _______( happen) , it’ll feel twice as good because of all the disappointment (失望) you 小题10:_______ ( have) . " At that moment I knew just what she meant.

如果使用胰岛素后体力减退，可能的原因包括（）

A.低血糖

B.低血钾

C.胰岛素水肿

D.过敏反应

E.饮食控制过严，能量摄入不够

在窗体上画一个名称为Text1的文本框和一个名称为Command1的命令按钮，然后编写如下事件过程： Private Sub Command1_Click() Dim i As Integer，n As Integer For i=0 To 50i = i + 3n = n + 1If i＞10 Then Exit For Next Text1.Text=Str(n) End Sub 程序运行后，单击命令按钮，在文本框中显示的值是

A．2

B．3

C．4

D．5

A粉末的CRH值为45%，B粉末的CRH值为89%，A与B以1：3混合后，在相对湿度为（）的环境下不吸湿。

在熔融缩聚中，可采用什么措施，以加快反应速度和提高缩聚物的分子量？