【单选题】家具中的有害物质主要来自木质人造板中固有的( )、家具制作过程中使用的胶粘剂,家具油漆过程中使用的涂料等。
【单选题】What is the main idea of this paragraph? The third quality of da Vinci's character that informs our work at MIT is an enthusiastic demand for making, designing, practicing, and testing, and for solvin...
A.
The third quality of da Vinci's character
B.
His fascination for tackling practical problems resembles the central mission of MIT.
C.
The third quality of da Vinci's character is his enthusiastic demand for making, designing, practicing, and testing, and for solving problems in the real world.
D.
Knowing is not enough; we must apply.
【简答题】以你所在班级为例说明哪些是正式组织,哪些是非正式组织?
【单选题】What is the third quality of da Vinci's character according to the passage?
A.
His disregard for the conventions.
B.
His ceaseless exploration of the Nature.
C.
His enthusiastic passion for solving practical problems.
【单选题】测定铅时,以什么为指示剂,什么为缓冲溶液,调节pH到多少?
【单选题】The third quality of da Vinci's character that informs our work at MIT is an enthusiastic demand for making, designing, practicing, and testing, and for solving problems in the real world. His fascina...
A.
The third quality of da Vinci's character that informs our work at MIT is an enthusiastic demand for making, designing, practicing, and testing, and for solving problems in the real world.
B.
His fascination for tackling practical problems resembles the central mission of MIT.
C.
Da Vinci taught his students to learn by doing in the same way that will define your MIT education.
D.
I have been impressed with the urgency of doing. Knowing is not enough; we must apply.
【单选题】下面的应用,描述错误的是
A.
电子手表和计算器的液晶显示,是偏振光和旋光的应用。
C.
用显微镜观察生药切片或透明生物组织能看到彩色结构图片,是色偏振的应用。
D.
分光光度计是测量药剂(溶液)吸收光谱的仪器,这是超声波的应用。