正确地选择施工方法是确定施工方案的关键，应从若干可行的施工方法中选择（）的施工方法。

额叶中央前回是

A．嗅觉中枢
B．视觉中枢
C．听觉中枢
D．皮层运动中枢
E．皮层感觉中枢

下面的程序是求9999以内的完全数。所谓完全数是指这样的自然数：它的各个约数(不包括该数自身)之和等于该数自身。如28=1+2+4+7+14就是一个完全数。请在程序的每条横线处填写一个语句，使程序的功能完整。
注意：请勿改动main()主方法和其他已有的语句内容，仅在横线处填入适当的语句。
源程序文件代码清单如下：
public class QuanShu

public static void main(String args[])

for (int n=1;n＜9999; n++)
if(______)
System.out.println (n);

public static int divsum(int n)
//该方法功能是求一个数的所有约数
int s=0;
for (int i=1; i＜n; i++)
if(______)
______
return s;

原子是由居于中心的带负电的原子核和核外带正电的电子组成，原子呈中性。（）

Part 4

Questions 26-45

·Read the following passage and choose the best word for each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.
Do you want to send an e-mail message to the White House
Good luck.
In the past, (26) President Bush — or at least those assigned to read his mail — what was (27) your mind it was necessary only to sit down at a personal computer connected to the lnternet and (28) a note to president@ whitehouse.gov.
But this week, Tom Matzzie, an online organizer with the A.F.L.-C.I.O., discovered that (29) with the White House had become a bit more (30) . When Mr. Matzzie sent an e-mail protesting (31) a Bush administration policy, the message was bounced back With an automated reply, saying he had to send it again in a new way.
Under a system (32) on the White House Website (33) the first time last week, those who want to send a message to President Bush must now (34) as many as nine Web pages and (35) a detailed form that starts by asking whether the message sender supports White House policy (36) differs with it.
The white House says the new e-mail system is an effort to be more responsive (37) the public and offer the administration "real time" access (38) citizen comments.
Completing a message to the president also requires (39) a subject from the provided list, then entering a full name, organization, address and e-mail address. (40) the message is sent, the writer must wait for an automated response (41) his message, (42) whether the addressee intended to send the message. The message is delivered to the White House only after the person using that e-mail address (43) it.
"Over (44) , it’s a very cumbersome process," said Jakob Nielsen, an authority on Web design. "It’s probably designed deliberately to (45) on their e-mail.\

A．and ask

B．ask

C．asking

D．asked

药学原始文献主要登载于（）。

A.《医学索引》

B.《中国药学文摘》

C.期刊杂志

D.《医学文摘》

E.万方数据资源系统