了（1）了（2）一件事了（3）。指出这句话“了”的词性：了1________，了2__________，了3__________

简述基准物质的条件：1__________,2__________,3__________,4__________

输尿管的三个狭窄部分别位于1__________;2__________;3__________。

下图中1-5的图层类型分别是: 1__________图层; 2__________图层; 3__________图层; 4_________图层; 5__________图层。[img=589x762]17e0c62546ff242.png[/img]

Conversation 2__________ A: To make a business report to the woman. B: To be interviewed for a job in the woman’s company. C: To resign from his position in the woman’s company. D: To exchange stock market information with the woman.

程序填空题：输入一个数据，如果该数据为负，则打印该数据；为正，则不做任何处理；为 0，则结束循环。#include <stdio.h>void main(){int data;while(1){scanf("%d",&data);if(data==0) _______1__________;else if(data>0) _______2__________;else printf("%d\n",data);}}

【单选题】NO 2 、NO 2 - 、NO 2 + 键角大小关系正确的是 。 A. NO 2 > NO 2 - >NO 2 + B. NO 2 + >NO 2 >NO 2 - C. NO 2 - > NO 2 >NO 2 + D. NO 2 + > NO 2 - >NO 2

求定积分[img=179x43]17da65388c0b1ca.png[/img]； （ ） A: log(2^(1/2) + 1)/2 + 2^(1/2)/2 B: log(2^(1/2) + 1)/2 - 2^(1/2)/2 - 1/2 C: log(2^(1/2) + 1)/2 + 2^(1/2)/2 - 1/2 D: log(2^(1/2) + 1)/2 + 2^(1/2)/2 + 1/2

2 + 2 * (2 * 2 - 2) % 2 / 3

函数z=xsiny在点(1,π/4)处的两个偏导数分别为 A: √2/2,√2/2 B: √2/2,-√2/2 C: -√2/2,-√2/2 D: -√2/2,√2/2