顽固的继发性高血压最常见的是（） A.皮质类固醇增多症 B.肾实质性高血压 C.原发

握持牙钳时，使钳柄张开的主要手指是

A．小指
B．环指
C．中指
D．示指
E．拇指

TCP/IP (1) layer protocols provide services to the application (2)running on a computer. The application layer does not define the application itself, but rather it defines(3)that applications need - like the ability to transfer a file in the case of HTTP. In short, the application layer provides an (4)between software running on a computer and the network itself. The TCP/IP application layer includes a relatively large number of protocols,with HTTP being only one of those. The TCP/IP (5)layer consists of two main protocol options - the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP).

空白（3）处应选择（）

A.services

B.processes

C.applications

D.address

下面是网友Abe的一条微博内容：It seems that none of my classmates want to be my friends because I’m fat. I feel very lonely in class. I suppose I’ll break down（崩溃） someday. 假设你是李华，请留言开导他，并适当给出一些建议。

注意：  1.可以适当增加细节，以使行文连贯。

2.作文开头已给，不计入词数。词数100左右。

Dear Abe,

Sorry to know that you’re so upset about your overweight. I quite understand what you’re feeling now.

骨骼的显像主要是通过^99mTc标记的磷酸盐与骨骼之间的下列哪种作用完成的（）。

A.离子交换和化学吸咐作用

B.渗透作用及负离子吸咐作用

C.骨骼细胞的吞噬作用及代谢作用

D.目前还不清楚

E.以上都不对