当镗削单孔时，应将工件装夹在工作台上的（）的位置。 A.位于工作台中央 B.位于上作

《诗•商颂•玄鸟》中说“邦畿千里，维民所止，肇域彼四海”。以下不属于四海的（）

A.云梦泽

B.贝加尔湖

C.黄海

D.渤海

男性，10岁，肥胖，患1型糖尿病，已开始注射胰岛素。

该患儿每天供给的能量应是（）。

A.1500kcal

B.1600kcal

C.1700kcal

D.1800kcal

E.1900kcal

人民警察执行职务，只接受检察机关、行政监察机关的监督。（）

Asynchronous Transfer Mode (ATM) is a (16) that promises to change the fabric of local and wide area communications.
The key advantage of ATM is the capability to move voice, data, graphics and (17) at speeds of up to 2 gigabits per second.
An ATM switch allows you to create a (18) network that is completely independent from the (19) configuration of the network.
ATM uses a (20) called cell switching to convert data into fixed length cells of 53 bytes each, so they can be switched very quickly and efficiently.

A．technology

B．video images

C．logical

D．physical

出口退税账户托管贷款属于一种（）流动资金贷款。

A.短期

B.中期

C.中长期

D.长期