搜题请搜索小程序“爱下问搜题”
问题 计算题

请根据下图所示的实验过程和提供的数据（步骤②产生的气体全部逸出），回答下列问题：（CaCl2溶于水，但不与稀盐酸反应）

计算原混合物样品中CaCl2的质量（写出计算过程）。

答案

2g

题目分析：实验过程中产生二氧化碳的质量=100g+100g+12g-207．6g=4．4g；设原混合物中碳酸钙的质量为x，则：

100                    44

x                     4．4g

x=10g

故原混合物中氯化钙的质量=12g-10g=2g。

单项选择题

患者高热，心烦，胸腹扪之灼手，四肢厥冷，舌红苔黄，脉沉伏。其病机是（）。

A.阳虚阴盛

B.阳盛伤阴

C.阴盛伤阳

D.阳盛格阴

E.由阳转阴
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 （71） at the customer premise over slow （72） ports.PPP was designed to run directly over these serial links. But with the advent of broadband Internet（73） 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 （74） or cable "modem" over a much faster medium such as Ethernet. It also means that multiple （75） can connect to the Internet through the sameconnection.

A．buffer

B．modem

C． computer

D．server
查看答案