Which one is a strong electrolyte? ( )
A. SiO2
B. H2O
C. HNO3
D. NH3
查看答案
15 104 (52)For a process to occur spontaneously, ( )
A. the entropy of the system must increase
B. the entropy of the surroundings must increase
C. both the entropy of the system and the entropy of the surroundings must increase
D. the net change in entropy of the system and surroundings considered together must be a positive quantity
Our perception of sweetness in wine is enhanced at higher temperatures.
A. True
B. False
Rieslings are usually __________ wines with high natural acidity and distinctive _________ attributes. The presence of toasty, kerosene notes indicates __________.
A. light-bodied / vegetal, grassy and tropical / oak maturation
B. full-bodied / vegetal, grassy and tropical / bottle aging
C. full-bodied / floral, apple and citrus / oak maturation
D. light-bodied / floral, apple and citrus / bottle aging
When evaluating the appearance of a white wine:
A. Clarity is not important
B. Colour and hue are not important
C. Light green tinges indicate oxidation has taken place
D. Light green tinges indicate a wine is young
微信支付 
支付宝支付