柴油发动机怠速不稳，急减速时易熄火，应主要检查怠速运转时喷油泵（）和怠速弹簧。
参考答案：供油齿条
胃泌素的临床表现：（）
A.清晨或饥饿时出现心慌、发抖、苍白、心动过速等症状
B.多发性十二指肠溃疡伴腹泻
C.反复发作的腹痛伴脂肪泻
D.腹胀伴呕吐、上腹扪及半球形的囊性肿块
E.水样性腹泻伴低钾和低胃酸
In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
A socket is basically an end point of a communication link between two applications. Sockets that extend over a network connect two or more applications running on (31) computers attached to the net-work. A socket (32) two addresses: (33) . Sockets provide a (34) communication channel between one or more systems. There are (35) sockets separately using TCP and UDP.
（32）是（）
A. is made of
B. composed of
C. is composed of
D. is consisted of
