乌桕油的熔点为( )
A．10～20℃B．34～38℃C．31～34℃D．30～34℃E．38～42℃
参考答案：E
解析：[知识点] 油脂性基质
She felt embarrassed at first when she was removed to a new school. Later on she felt ______, getting along well with her classmates.
A．out of place
B．at home
C．in trouble
D．under pressure
在下列多路复用技术中，适合于光纤通信的是 (19) ，在数据通信中，利用电话交换网与调制解调器进行数据传输的方法属于 (20) 。
A．频带传输
B．宽带传输
C．基带传输
D．IP传输
