下列对胆总管分段哪项不正确
A．十二指肠上段B．十二指肠内侧段C．胰腺段D．十二指肠后段E．十二指肠壁内段
参考答案：B
In recent years, many mainland residents have rushed to Hong Kong to buy baby milk powder due to their ________ about its quality.
A．anxiety
B．curiosity
C．generosity
D．attention
既有离子键，又有共价键的化合物是
A．CO2
B．MgCl2
C．Na2O2
D．NaOH
