题目内容：

    A table-waiting robot cat built by a Chinese technology firm can carry plates of food, navigate a restaurant, miaow（喵喵叫）at diners—and even react to having its ears stroked.

Making its debut at the 2020 Consumer Electronics Show in Las Vegas, the so-called BellaBot was built for Chinese restaurants lacking enough waiters. It is the brainchild （智慧结晶）of the Chinese robotics and artificial intelligence firm PuduTech.

It features four shelves in the center of its tower-like body to carry plates. Having been loaded up with meals by its human colleagues, the cat-themed robotic waiter miaows when it delivers food to diners to encourage them to take their plates. If customers thank BellaBot by stroking its ears, it will initially respond with a look of pleasure on its on-board screen, which displays animations of a cat's face. “The owner's hand is so warm,” BellaBot has been programmed to respond.

However—much like a real cat—the robot’s reaction soon changes if it is petted for too long. “It gets mad to remind you not to interrupt its job,” the designers introduced.

The BellaBot waiter robot is a more personality-rich update to PuduTech's previous model, which featured a more utilitarian （实用主义的）design and user interface. Both BellaBot and its predecessor were designed with a particular mind to Chinese restaurateurs which are often short of waiting staff.

In a real-world food-service setting, however, BellaBot may find it difficult to operate at peak times. Nevertheless, restaurants are expected to increase their trust on automation—whether in the form of robotic waiting staff or otherwise.

Furthermore, the technology improvements of robotic waiters designs will be grown steadily, especially better at communicating with humans and tackling new activities.

1.Why did the technology firm create the BellaBot?

A.Because the restaurant can react to it.

B.Because it is the brainchild of the Chinese robotics and Al firm.

C.Because the Chinese scientists want to show their talent to the world.

D.Because it is can be used when Chinese restaurants are short of enough waiters.

2.When do the robotic waiters deliver the food to dinners?

A.The customers touch the robotic waiters’ ears.

B.The customers are encouraged to take their plates.

C.The human colleagues have loaded up the meals on robotic waiters.

D.The robotic waiters display animations of a cat's face on their on- board screen.

3.What can we infer from the robot's reaction changes?

A.It wants to remind you to get mad.

B.It wants to remind you to pet it again.

C.It wants to remind you not to help its work.

D.It wants to remind you not to stop its work.

4.What is the author's attitude to the robotic waiters?

A.Doubtful. B.Positive.

C.Negative. D.Ambiguous.