用多层降尘室除尘，已知降尘室总高4m，每层高0.2m，长4m，宽2m，欲处理的含尘气体密度为1kg／m3，黏度为3×10－5Pa·s

How well the members learn in the Project X program is demonstrated by______.

A．their annual creative performances

B．their annual scores gained at school

C．the comments of friends and family

D．the comments of the program teachers

dentify DNA sequences that are important in mammalian gene regulation are becoming increasingly______.

A．stellar

B．feasible

C．prominent

D．intrusive

E．utile

dentify DNA sequences that are important in mammalian gene regulation are becoming increasingly ______ .

A．stellar

B．feasible

C．prominent

D．intrusive

E．utile

dentify DNA sequences that are important in mammalian gene regulation are becoming increasingly______.

A．stellar

B．feasible

C．prominent

D．intrusive

E．utile

dentify DNA sequences that are important in mammalian gene regulation are becoming increasingly ______ .

A．stellar

B．feasible

C．prominent

D．intrusive

E．utile

听力原文： Scientists are gearing up for one of the most ambitious international research programs ever attempted: a decade-long exploration of the world's oceans to unlock some of the most closely held secrets of the creatures of the deep. Using sophisticated technology that was not available even five years ago, the scientists will rely primarily on the animals they want to study to collect the data needed to complete the "Census of Marine Life". Creatures ranging from blue whales to turtles will be fitted with satellite tracking devices that will record their every movement. The project, involving scores of institutions around the globe, is expected to cost upwards of $1 billion, and it will take at least 10 years. The scientists hope the research will tell us much more about a region of the earth we understand so poorly. That area, incidentally, covers 70 percent of the globe.

(33)

A．10 years.

B．20 years.

C．30 years.

D．50 years.

annual creative performances B)their annual scores gained at school C)the comments of friends and family D)the comments of the program teachers

根据以下资料，回答下列各题：What is remarkable about the Kalale project in Benin？

A.It makes use of solar power.

B.It uses many diesel engines for pumping water.

C.It s the combination of two proven technologies.

D.It is an ambitious plan carried out by a nongovernmental organization.