A form to which an affix of any kind can be added is called a stem.
正确
错误

下面哪项是治疗性研究的基本特点（）A．全面性 B．可靠性 C．有效性 D．逻辑性 E．无害性

单项选择题下面哪项是治疗性研究的基本特点（）

提高H型钢梁整体稳定性的有效措施之一是：( )A.加大受压翼缘宽度B.加大受拉翼缘宽度C.增设腹板加劲肋D....

单项选择题提高H型钢梁整体稳定性的有效措施之一是：( )

When the author first saw nesting place of the gorillas...

单项选择题When the author first saw nesting place of the gorillas, it was a\an ____. A.
old place B.
new place C.
neither of them