题干

等物质的量浓度、等体积的酸HA与碱NaOH 溶液混合后,溶液的酸碱性是(   )

A:酸性

B:中性

C:碱性

D:前三者都有可能

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答案(点此获取答案解析)

B,C

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    Guide to four of the most exciting new adventure trips for 2017:

    Sahara

    Attractions: International Expeditions   Length: 18 days   Price: $13,998

Details: Remember the movie Ishtar? Now you, too, can spend days wandering in the desert, just like warren Beatty and Dustin Hoffman. Designed for rugged travelers, the camping expedition crosses1,500 miles of Niger's Sahara in four—wheel—drive vehicles.

    Departure Time: May 12     Information: 800-633-4731;  ietravel.com

    Across Patagonia: From the Andes to the Ocean

    Attractions: Boundless Journeys   Length: 10 days    Price: $8,995

    Details: The newest route across Patagonia starts high in the Argentine Andes and follows the Futaleufu River into Chile all the way to the Pacific Ocean. Travelers start by trekking along the river, changing to rafts before taking up kayaks for the final leg.

    Departure Time: March 5    Information: 800-941-8010; boundless, com.

Tribal(部落的)India

    Attractions: Myths and Mountains      Length: 17 days        Price: $17,530

    Details: For the travelers who have already visited the best-known India sites, this new trip visits a relatively unexplored state in central India ruled by the Vindhyachal Range and known for its wildlife, waterfalls, ancient sites and tribal culture.

    Departure Time(出发时间): Feb 17   Information: 800-670-6984; myths.com

    Dalmatian Coast Biking

    Attractions: Backroads            Length: 7 days           Price: $7,298

    Details: The company's first foray into Croatia follow scenic roadways across four islands between Dubrovnik and Spht.

    Departure Time: May 7    Information: 800-462-2848; backroads.com