皮皮学，免费搜题
登录
搜题
【简答题】
12 Section C Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre. Passage One Questions 16 to 19 are based on the passage you have just heard. 16.A) She had a desire to help others. B) She wanted to find out more about it. C) She needed some overseas experiences. D) She was interested in farming. 17.A) Carry out a cultural exchange program. B) Work on an agriculture project. C) Learn Portuguese. D) Teach English. 18.A) She found it difficult to secure a job in her own country. B) She wanted to renew her contact with the Peace Corps. C) She was invited to works as an English teacher. D) She could not get the country out of her mind. 19.A) By teaching additional English classes. B) By writing stories for American newspaper. C) By working part time for the Peace Corps. D) By doing odd jobs for local institutions.
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】在使用电脑过程中应该采取哪些网络安全防范措施
A.
安装防火墙和防病毒软件，并经常升级，及时更新木马库, 给操作系统和其他软件 打补丁。
B.
对计算机系统的各个账号要设置口令，及时删除或禁用过期账号。
C.
不要打开来历不明的网页、邮箱链接或附件，不要执行从网上下载后未经杀毒处理 的软件，不要打开QQ 等即时聊天工具上收到的不明文件等。
D.
打开任何移动存储器前用杀毒软件进行检查。
E.
定期备份，以便遭到病毒严重破坏后能迅速修复。
【单选题】若输入a的值是6,则以下程序中循环体会被执行( )次。 int a,b=10; scnaf("%d",&a); while(a-1>0) { b--; a-- ; } printf("%d",b);
A.
4
B.
5
C.
6
D.
无限
【单选题】下列哪一组原子核的核磁矩为零;不产生核磁共振信号的是( )
A.
2 H 、 14 N
B.
19 F 、 12 C
C.
1 H 、 13 C
D.
16 O 、 12 C
【简答题】以下程序会执行( )次循环体。 #include int main( ) { int y=10; do { y--; }while(--y); printf("%d\n",y--); return 0; }
【多选题】下列关于蓄能器的使用和安装不正确的是( )
A.
蓄能器一般应垂直安装，油口向上
B.
搬运和拆装时应排出压缩气体
C.
用作降低噪声、吸收脉动和冲击的蓄能器应尽可能靠近振源
D.
充气式蓄能器中应不使用惰性气体
相关题目：