旅游者来投诉时，一般要由（）出面礼貌的接待。 A.领导 B.服务员 C.接待员 D.

下面是几位同学有关分子的讨论，其中错误的是（　　）

A．酒精的挥发是由于酒精分子不断运动而扩散到空气里去的缘故

B．任何物质的分子间都有间隔

C．空气里的氧分子和氯酸钾分解得到的氧分子化学性质相同

D．分子是构成物质的唯一的一种粒子

The arts, especially music, should be part of every school's lessons at every grade level. Students would be much smarter if they had some musical experience. They could improve their classroom skills, like paying attention and following directions. People develop all these skills when they learn music. Making music also lets children use their imagination. It provides students with a chance to try out their own ideas.

Music not only makes children better students, but also gives them something positive to do. In a music program, children can be part of a band instead of joining a gang (团伙). Parents can enjoy listening to their children's music instead of seeing them glued to a computer or TV screen. In a school band, students get to be part of a team. They can get along well with old friends and make new friends through music.

Music builds self-confidence, too. It gives children a sense of achievement and success. Making music is something for them to be proud of, and it lets kids practice performing in front of an audience. Music gives children an opportunity for self-expression, and that helps develop their self-confidence.

Once again, music is important because it can make children better students, give them something positive to do, and build their character. That is why music should be offered in every single grade in every school.

小题1:According to the passage, music could make students smarter by _______________.

A．improving their classroom skills and paying attention

B．improving their classroom skills and imagination

C．improving their attention, direction and imagination

D．learning music, making music and trying out their own ideas小题2:What does the underlined phrase "glued to" in the second paragraph mean?

A．unwilling to turn on

B．always looking

C．unwilling to leave

D．always playing小题3:The third paragraph mainly tells us that music could _______________.

A．give children self-expression and self-confidence

B．bring to children achievement and success

C．give children something to be proud of

D．develop children's self-confidence小题4:What's the best title of this passage？

A．Music is a must as a course at school

B．Music builds children's self-confidence

C．Music makes students much smarter

D．Learning music and making music

直接破坏DNA并阻止其复制的药物是（）

A.他莫昔芬

B.长春新碱

C.氟脲嘧啶

D.塞替哌

E.放线菌素D

项目管理的好处在于能够（）辩别问题，从而产生（）

A.迅速地，执行活动

B.在早期，正确的行为活动

C.在招待期间，项目计划

D.迅速地，客户通知

照明种类可分为( )。

A．局部照明；
B．事故照明；
C．警卫照明；
D．障碍照明。