题目内容

关于骨肉瘤的临床特点,下列哪个答案是错误的()

A. 常见于股骨下端、胫骨和腓骨上端
B. 高度恶性
C. 晚期易发生肺转移
D. X线表现骨破坏与成骨并存

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52 查看材料

A. worried
B. concerned
C. curious
D. hopeful

下列有关骨显像受检者准备错误的是()

A. 注射显像剂前患者无须特殊准备
B. 注射显像剂后患者应多饮水
C. 显像前应尽量排空尿液
D. 显像时不必取走患者身上的金属物品

下面的短文有15处空白,请根据短文内容为每处空白确定l个最佳选项。
A Powerful Influence
There can be no doubt at all that the Internet has made a huge difference to our lives. Parents are worried that children spend too much time playing on the Internet, hardly __________(51) doing anything else in their spare time. Naturally, parents are__________(52) to find out why the Internet is so attractive, and they want to know if it can be __________(53) for their children. Should parents worry if their children are spending that much time__________(54)their computers?
Obviously, if children are bent over their computers for hours, absorbed__________(55 ) some game, instead of doing their homework, then something is wrong. Parents and children could decide how much use the child should __________ (56) use of the Internet, and the child should give his or her__________(57) that it won&39;t interfere with homework. If the child is not__________(58 ) to this arrangement, the parent can take more drastic__________(59) dealing with a child&39;s use of the Internet is not much different from__________ (60) any other soft of bargain about behaviour.
Any parent who is__________(61)alarmed about a child&39;s behaviour should make an appointment to__________(62) the matter with a teacher. Spending time in front of the screen does not necessarily __________(63) a child&39;s performance at school. Even if a child is__________ (64) crazy about using the Internet,he or she is probably just__________(65)through a phase, and in a few months there will.be something else to worry about!
51 查看材料

A. always
B. rarely
C. never
D. ever

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Although it may seem that everyone owns a smartphone these days.
B. If Apple offers a less expensive model of the iPhone later this year.
C. The same theory can be applied to customers who are making the switch to smartphones today.
D. Who purchased a new mobile phone in the last three months.
E. The smartphone race is still raging.
F. If it works,why switch?

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