【单选题】The main idea of this passage is that ______.
A.
light causes sea color
B.
sea coloration is varied because of a combination of length of light waves and microscopic plant life and silt
C.
microscopic plant life causes sea color
D.
water composition causes sea color
【单选题】 "生活质量加安全"是下列哪个国家的主要激励措施?( )
【单选题】( )内有十三尊包骨真身像,虽历经千年而骨架完好,颇有灵气,是研究绵山历史文化和地理气候的重要文物。
【单选题】下列关于栓剂叙述错误的是()
B.
栓剂仅通过直肠给药途径发挥局部或全身治疗作用
D.
药物与基质混合均匀,外形应完整光滑,无刺激性
【单选题】Which of the following statements best expresses the main idea of the passage?
A.
Glass is very useful because it has many unusual qualities.
B.
Light signals have changed the use of glass in industry.
C.
Glass fibers have reduced the cost of telephone communication.
D.
The use of glass fibers to carry telephone messages is an interesting new development.