搜题请搜索小程序“爱下问搜题”
问题 单项选择题 B型题

双香豆素可（）

A.抗菌作用

B.解痉利胆作用

C.拮抗维生素K作用

D.光敏作用

E.致癌

答案

参考答案：C

解析：黄曲霉素可致癌，补骨脂内酯具有光敏作用，双香豆素可拮抗维生素K的作用而用于抗凝，莨菪碱可解痉利胆，七叶内酯具有抗菌作用。

单项选择题

生产经营单位新建、改建、扩建工程项目的安全设施，必须与主体工程( )。

A．同时设计、同时施工、同时投入生产和使用
B．同时规划、同时设计、同时施工
C．同时设计、同时监理、同时使用
D．同时规划、同时设计、同时施工
查看答案
单项选择题

Most IP layer-based proxy mechanisms, such as network address translation (NAT), only support uni-directional proxy, from the internal network to external network (the Internet). The proxy establishes the communication channel by (86) IP addresses. The IP addresses must be (87) . These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels, such as, multimedia applications. IP layer-based proxy mechanisms need additional software (88) for each application that uses (89) channels. SOCKS identifies communication targets through domain names, overcoming the restriction of using private IP addresses. SOCKS can use domain names to establish communication between separate LANs, with (90) IP addresses.

（89）是（）

A.plenty

B.many

C.multiple

D.more
查看答案