搜题请搜索小程序“爱下问搜题”
问题 单项选择题

可复性牙髓炎选用的盖髓剂是（）

A．氢氧化钙

B．抗生素+激素

C．玻璃离子粘固粉

D．聚羟酸锌粘固粉

E．氧化锌丁香油糊剂

答案

参考答案：E

解析：

可复性牙髓炎选用的盖髓剂是氧化锌丁香油糊剂。

多选题

一辆汽车由静止开始做匀加速直线运动，下列说法正确的是（　　）

A．在1秒内、2秒内、3秒内的位移之比是1：3：5

B．第1秒末、第2秒末、第3秒末的速度之比是1：2：3

C．若第2秒内的位移为3m，则第3秒内的位移为5m

D．通过连续相等位移的所用时间之比1：4：9
查看答案
单项选择题

Traditional Internet access methods like dial-up were so slow that host computers were connected to the dial-up. (6) at the customer premise over slow (7) ports. PPP was designed to run directly over these serial links. But with the advent of broadband Internet (8) technologies such as ADSL and cable modems there has been a considerable increase in the bandwidth delivered to the end users. This means that the host computers at the customer premise connect to the (9) or cable "modem" over a much faster medium such as Ethernet. It also means that multiple (10) can connect to the Internet through the same connection.

（7）是（）

A.parallel

B.digital

C.serial

D.variable
查看答案