将洁净的金属片甲、乙、丙、丁分别放置在浸有某种盐溶液的滤纸上面并压紧(如下图所示

Bluetooth is a universal radio interface in the (71) frequency hand that enables portable electronic devices to connect and communicate wirelessly via short-range, ad hoc networks. Each unit can simultaneously communicate with up to (72) other units per piconet. Moreover, each unit can simultaneously (73) to several piconets. Eliminates the need for wires, cables and connectors for and between cordless or mobile phones, modems, headsets, PDAs, Computers, printers, projectors, local area networks, and so on, and paves the way for new and completely different devices and applications. Technology Characteristics (74) symbol rate exploits maximum available (75) bandwidth。

A．messages

B．certificates

C．applets

D．channel

革兰阳性杆菌，有氧不生长，菌体排列呈Y、V等多形性，标本有醋酸味，最可能是哪种细菌 （）

A.破伤风杆菌

B.双歧杆菌

C.丙酸杆菌

D.艰难梭菌

E.白喉棒状杆菌

以下程序段运行的结果是______。
Dim a(-1 To 5)As Boolean
Dim flag As Boolean
flag=False
Dim i As Integer
Dim j As Integer
Do Until flag=True
For i= -1 To 5
j=j+1
If a (i)= False Then
a(i)=True
Exit For
End If
If i=5 Then
flag=True
End If
Next
Loop
Print j

A．20

B．7

C．35

D．8

这位行人拒绝帮忙，但简爱没离开，因为（）。

A.他说话时没有微笑

B.他每天紧皱，态度粗鲁

C.他伤得不轻

D.简爱觉得有必要帮他

城镇国有土地使用权初始登记申报范围包括（）。

A.城市

B.县城

C.建制镇建成区

D.宅基地

E.企事业单位的国有土地使用权